Citation styles vary by course and subject. For journalism, you may use AP Style and APA Style more often. You will also see Chicago/Turabian style. Always check with your professor on the required citation styles for your specific assignments.
For more information on specific styles, see the following guides from the Purdue Online Writing Lab (OWL):
And check out the following handbooks available in Paul Meek Library's collection:
Publication Manual of the American Psychological Association
The Chicago Manual of Style by News sources can be used to identify current trends in society and politics. These trends and sources can be used in a variety of careers and projects, ranging from public health to technical writing to business. In your class assignments, you may also use news sources for background research, to help inform your topic selection, or future research.
Examples:
Politicians and their advisors use trends in the media to craft speeches, identify topics relevant to voters, and decide where to place campaign ads.
Scientists may be able to cultivate public interest in research by collaborating with science reporters. One example of a collaborative effort to improve public science literacy has been developed by The Alda Center with support from Stony Brook School or Journalism. It's just one example of a partnership between journalists and scientists.
Scholars research the news itself or trends in news consumption/reactions among various audiences. This sort of research may take place in the social sciences, communication, or in the field of psychology.
Historians use historical news sources to trace origins of events, public views of an event or person through time, and as primary resources to help piece together and analyze the past. They can be great tools to track down even more sources when trying to build a more detailed picture of the past.
Political Public Relations: Principles and Applications by 
Carter G. Woodson: History, the Black press, and public relations by